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Per Magnus Jørgensen
Per Magnus Jørgensen
Born	25 July 1944 (age 80); Stavanger, Norway
Nationality	Norwegian
Alma mater	University of Bergen; Uppsala University
Awards	Acharius Medal
	Scientific career
Fields	Botany; Lichenology
Institutions	University of Bergen
Author abbrev. (botany)	P.M.Jørg.

Per Magnus Jørgensen (born 1944) is a Norwegian botanist and lichenologist, and Professor Emeritus of systematic botany at the University of Bergen. He is known for his work on the lichen families Pannariaceae and Collemataceae. Jørgensen was awarded the Acharius Medal in 2021 for his lifetime contributions to lichenology.

Biography

Jørgensen was born in Stavanger, Norway, in 1944. He obtained his Candidatus realium from the University of Bergen in 1969,^[1] where Knut Fægri was his supervisor.^[2] In 1978, he earned a doctor philosophiae from University of Bergen, with a dissertation titled "The lichen family Pannariaceae in Europe". He was a student of prominent lichenologist Rolf Santesson;^[1] Gunnar Degelius was another early mentor.^[3] During his time as a student, he was recruited to work at the Botanical Garden in Bergen.^[2] A few years after receiving his doctorate, he was appointed Professor of Systematic Botany at the University of Bergen in 1982. He was known for delivering his university lectures with great enthusiasm, and for helping to popularize botany in Norway.^[4] As of 2020, he is a Professor Emeritus at the University of Bergen.^[5]

Jørgensen is a member of the Norwegian Academy of Sciences. He has about 300 publications dealing with the systematics, floristics, biogeography, and nomenclature of lichens;^[1]^[2] in these papers he described about 300 taxa new to science.^[6] A specialist of the family Pannariaceae, he has also written about several other families in the third volume of the Nordic Lichen Flora. More recently, he has published several works about the history of lichenology.^[1] Examples include books on the history of botany in Norway, and on the history of Bergen's Museumgarden, and publications on Carl Linnaeus and Johan Ernst Gunnerus, including translating the latter's 1770 work Flora Norvegica from Latin into Norwegian. Jørgensen is a connoisseur of the plant genus Rhododendron and maintains a large collection of these plants in the Bergen botanical garden.^[1] He was editor of the popular science magazine Naturen from 1991 to 1997.^[5]

Jørgensen became an honorary lifetime member of the British Lichen Society in 2008.^[2] In 2021 Jørgensen was awarded the Acharius Medal, recognizing his lifelong contribution to lichenology.^[7]

Lichen taxa named in honour of Jørgensen include the species Stigmidium joergensenii R.Sant. (1989),^[8] Leptogium joergensenii Marcelli & Kitaura (2014),^[9] and the genus Joergensenia Passo, S.Stenroos & Calvelo (2008).^[10]

Selected publications

Jørgensen, Per M. (1978). The Lichen Family Pannariaceae in Europe. Opera Botanica. Vol. 45. Stockholm: Swedish Natural Science Research Council. pp. 1–123.
Jørgensen, Per M.; James, Peter W.; Jarvis, Charles E. (1994). "Linnaean lichen names and their typification". Botanical Journal of the Linnean Society. 115 (4): 261–405. doi:10.1111/j.1095-8339.1994.tb01784.x.
Jørgensen, Per M. (2001). "Great discoveries in bryology and lichenology: Th. M. Fries (1832–1913), great Scandinavian lichenologist". The Bryologist. 104 (4): 537–542. doi:10.1639/0007-2745(2001)104[0537:TMFAGS]2.0.CO;2. JSTOR 3244587.
Jørgensen, Per M. (2002). Conspectus familiae Pannariaceae (Ascomycetes lichenosae) (PDF). Ilicifolia. Vol. 4. Bergen: Botanisk institutt, Universitetet i Bergen. pp. 1–78. ISBN 82-7460-014-2.
Jørgensen, Per M. (2007). "History of lichenology in Norway up to 1973". Bibliotheca Lichenologica. 95: 41–61.
Jørgensen, Per M., ed. (2007). Botanikkens historie i Norge [History of Botany in Norway] (in Norwegian). Bergen: Fagbokforlaget Vignostad & Bjoeke AS. ISBN 978-82-450-04991.
Jørgensen, Per M. (2017). "The development of lichenology in the history of botany". The Bryologist. 120 (1): 37–44. doi:10.1639/0007-2745-120.1.037. S2CID 90626078.

The standard author abbreviation P.M.Jørg is used to indicate this person as the author when citing a botanical name.^[11]

References

^ ^a ^b ^c ^d ^e Hertel, Gärtner & Lőkös 2017, p. 71.
^ ^a ^b ^c ^d Andersen, Heidi Lie; Tønsberg, Tor. "The Acharius Medal. Per Magnus Jørgensen" (PDF). International Lichenological Newsletter. 54 (2): 7–8.
^ Hawksworth, D. L. (2007). "The Lichen Family Pannariaceae in Europe. By Per M. Jørgensen. [Opera Botanica No. 45.] Swedish Natural Science Research Council, Stockholm. 20 November 1978. Pp. 123, figures 53, tables 8. Price SKr 110 (SKr 66 for personal use)". The Lichenologist. 11 (2): 204. doi:10.1017/S0024282979000244.
^ Kärnefelt 2009, p. 312.
^ ^a ^b "Per Magnus Jørgensen". University of Bergen. 4 June 2020. Retrieved 26 December 2020.
^ Kärnefelt 2009, p. 311.
^ "Acharius Medallists". International Association for Lichenology. Retrieved 26 April 2022.
^ Santesson, Rolf (1989). "Parasymbiotic fungi on the lichen-forming basidiomycete Omphalina foliacea". Nordic Journal of Botany. 9 (1): 97–99. doi:10.1111/j.1756-1051.1989.tb00991.x.
^ Kitaura, Marcos J.; Marcelli, Marcello P.; da Hora, Bianca R.; Jungbluth, Patricia (2015). "Leptogium denticulatum (Collemataceae, lichenized Ascomycota) and some morphologically related species". The Bryologist. 118 (1): 11–21. doi:10.1639/0007-2745-118.1.011. S2CID 86406123.
^ Passo, Alfredo; Stenroos, Soili; Calvelo, Susana (2008). "Joergensenia, a new genus to accommodate Psoroma cephalodinum (lichenized Ascomycota)". Mycological Research. 112 (12): 1465–1474. doi:10.1016/j.mycres.2008.06.025. PMID 18675347.
^ International Plant Names Index. P.M.Jørg.

Cited literature

Hertel, Hannes; Gärtner, Georg; Lőkös, László (2017). "Forscher an Österreichs Flechtenflora" [Investigators of Austria's lichen flora] (PDF). Stapfia (in German). 104 (2): 1–211.
Kärnefelt, Ingvar (2009). "Fifty influential lichenologists". In Thell, Arne; Seaward, Mark R. D.; Feuerer, Tassilo (eds.). Diversity of Lichenology – Anniversary Volume. Bibliotheca Lichenologica. Vol. 100. Stuttgart: J. Kramer. pp. 283–368. ISBN 978-3-443-58079-7.